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Mathematics, 07.02.2021 18:50 kkingstone1231

PQRS is a parallelogram in which the coordinates of P, Q and R are (1, 2), (7,-1), (-1, -2) respectively.
a Find the equations of PS and RS.
b Find the coordinates of S.
c Prove that angle QPR is 90°.
d Calculate the area of the parallelogram.
e Find the length of the perpendicular from P to QR leaving your answer in surd
form.

Note: this is AddMath. Please help me i am stuck in this question for a whole afternoon

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